Cutting mechanism for mowing-machines



PATENT OFFICE.

. WARREN' E. SMITH, OF HAVANA,` OHIO.

CUTTING MECHANISM FOR MO'WING-MAGEINES.

Specification of Letters Patent.

Patented J an. 4, 1921.

Application led August 7, 1919. Serial No. 815,935.

To all whom t may concern.'

Be it known that I, WARREN E. SMITH, a citizen of the United States, residing at Havana, in the county of Huron and State of Ohio, have invented certain new and useful Improvements in Cutting Mechanism for Mowing-Machines; and I do declare the following to be a full, clear, and exact desoription of the invention, such as will enable others skilled in the art towhich it appertains to make and use the same.

This invention relates to improvements in harvesters and mowing machines, and it has more particular reference to an improved means for removably securing the blades to the blade bar or sickle bar, so that the blades may be easily taken oli for repairing, etc.

The principal obj ect of the invention is to provide a simple and improved method of attaching or detaching the cutter b lade's, which is easily accomplished and which is particularly adapted for the purpose for which it is designed.

Other objects and advantages of the invention will be apparent during the course of the following description.

In the accompanying drawings forming a part of this specication and in which like numerals are employed to designate like parts throughout the same.

Figure l is a plan or top view of, a device constructed in accordance with my invention.

Fig. 2 is a sectional view on the line 2-2 of Fig. 1.

Fig. 3 is a top or plan view of a portion of a blade bar or sickel bar, the blades being removed.

Fig. 4 is a detached view of one of the blades. ,i

Fig. 5 is a detached view of one of the clamping plates.

In the drawings wherein for the purpose of illustration is shown a preferred form of my invention, the numeral 1 designates a blade bar which is provided on its upper face with projections or upstanding lugs 2, which are preferably cast integral therewith and diamond-shape in configuration as shown.

The cutting blade 3 is provided with an opening 4 therein corresponding in shape to the lug 2, and it is fitted snugly over said lug, the thickness of the lug being less than the thickness of the blade. A clamping plate or member 5, which is also preferably diamond-shaped and of a` greater area or size than the opening 4 in the blade, is employed to securely fasten the blade in position. This plate or member is provided with an aperture 6 adjacent its center, which is square and countersunk as shown. A bolt 7 of any suitable construction but preferably provided with a square head is passed through the apertured plate or clamping member and then through the apertured lug 2 and bar l thus holding the plate tightly against the cutting blade when the nut 8 is tightened.

It should be noted that because of the non-circiilar shape of the opening 4 in the blade and the non-circular shape of the lug 2, the blade will not rotate, and will remain stationary and in proper position at all times.

Although I have shown the parts 2, 4 and 5 as being diamond-shaped, it is to be understood that they will work equally as well if they are made in any other non-circular shape, such as for instance, square or rectangular, etc.

The con-struction of my device will permit the blades to be readily attached or detached. It is obvious that the blades may be removed by taking the nut olf, thus loosening the clamping plate and bolt, which may then be removed.

It is to be understood that the form of my invention herein shown and described is to be taken as a preferred embodiment of the same, and that various change-s in the shape, size and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope of the subjoined claim.

Having thus described my invention, what I claim is:

The combination of a blade bar having diamond-shaped projections thereon pro'- vided with centrally disposed apertures eX- tending therethrough and through the bar, a plurality of cutting blades arranged in abutting relationship, each blade being provided with a diamond-shaped opening eX- tending therethrough and tting snugly around one of said projections, each opening being of a length equal to approximately one-half of the width of the blade and its v direction of elongation being parallel With openings in the projections and bar, nuts on respect to the movement of said bar, each said bolts, and co-actng means between the blade being of a thickness greater than the heads of the bolts and clamping plates to l0 height of the projections, apertured clampprevent relative rotation of these parts.

ing plates of a greater area than said open- In testimony whereof I have hereunto set ing and proj ections7 bolts extending through my hand.

the apertures in the clamping plates and WARREN E. SMITH. 

